Mike's Workshop Manuals
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2021
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Grand Cherokee Trackhawk
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Repair and Diagnosis
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Engine Performance
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System
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6.2L - DTCS P0443 To P0688
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DTC Troubleshooting
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P0628-Fuel Pump Control Circuit Low
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Set Condition
Set Condition
The Fuel Pump Control Module (FPCM) detects excessive current draw on the Fuel Pump PWM Control circuit and determines that the Fuel Pump PWM Control circuit is shorted to ground.